Department of Chrono-Environment, UMR 6249, University of Franche-Comte, Place Leclerc F-25030 Besançon, France.
Ecotoxicol Environ Saf. 2010 Oct;73(7):1776-84. doi: 10.1016/j.ecoenv.2010.07.012. Epub 2010 Aug 2.
Our previous in situ study showed that bryophyte-microorganism complexes were affected by particulate atmospheric pollution. Here, the effect of urban particulate wet deposits on microbial communities living in bryophytes was studied under controlled conditions. An urban particulate solution was prepared with particles extracted from analyzer' filters and nebulized on bryophytes in treatments differing in frequency and quantity. The bryophytes did not accumulate metallic trace elements, which were present in very weak concentrations. However, in treated microcosms the total microbial biomass and the biomasses of cyanobacteria, active testate amoebae and fungi significantly decreased in response to the deposition of particles. These results confirm that microbial communities living in terrestrial bryophytes could be more sensitive indicators of atmospheric pollution than bryophytes. Moreover, they suggest that unicellular predators--such as testate amoebae--could be especially useful microbial indicators, since they seem to be both directly and indirectly affected by pollution.
我们之前的原位研究表明，苔藓-微生物复合体受到大气颗粒物污染的影响。在这里，在受控条件下研究了城市颗粒物湿沉积物对生活在苔藓植物中的微生物群落的影响。使用从分析器过滤器中提取的颗粒制备了城市颗粒物溶液，并在处理中以不同的频率和数量将其雾化在苔藓植物上。苔藓植物没有积累金属微量元素，这些微量元素的浓度非常低。然而，在处理的微宇宙中，微生物生物量和蓝藻、活跃的有壳变形虫和真菌的生物量明显减少，这是对颗粒物沉积的响应。这些结果证实，生活在陆地苔藓植物中的微生物群落可能比苔藓植物对大气污染更敏感。此外，它们表明单细胞捕食者，如有壳变形虫，可能是特别有用的微生物指标，因为它们似乎直接和间接地受到污染的影响。
